Dermal fillers are usually delivered into the soft tissues using conventional needles. Because they are sharp, when these needles move through the tissues they cut and tear through tissues and blood vessels. This can cause excessive bleeding and bruising.
Microcannulas, on the other hand, are blunt and made of plastic. This makes them more flexible and less traumatic than standard needles. Unlike needles, they can navigate through tissue easily without cutting or tearing blood vessels. This significantly decreases the risks of bleeding and bruising. By moving blood vessels out of the way instead of cutting through them the risk of injecting a filler directly into a blood vessel is virtually zero. From a single entry point microcannulas can deliver fillers precisely over an area which would require multiple needle punctures. Fewer injections means less pain, more comfort, and less risk of complications.